Thank you for sharing all this great information. I am thinking about setting up a dual channel version of this on my KTM. Your findings confirms a lot of my theories about how the modern FI systems work.
These facts also puts many of accepted conclusion to the test. I have never been a believer in disabling the stock O2 sensors and running PCIII units etc..
My KTM has a Keihin ECU but I am convinced that the same logics of operation applies.

Espeacially nice that you confirmed the adjustments made in closed loop carried over to the open loop operation.